package com.pms.utils;

import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.net.JarURLConnection;
import java.net.URL;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;

public class AllClass {
	public static Class<?>[] getClasses(String pack) { 
        List<Class<?>> classes = new ArrayList<Class<?>>();  
        boolean recursive = true;  
        String packageName = pack;  
        String packageDirName = packageName.replace('.', '/');  
        Enumeration<URL> dirs;  
        try {  
            dirs = Thread.currentThread().getContextClassLoader().getResources(  
                    packageDirName);  
            while (dirs.hasMoreElements()) {  
                URL url = dirs.nextElement();  
                String protocol = url.getProtocol();  
                if ("file".equals(protocol)) {  
                    System.err.println("Scan file type");  
                    String filePath = URLDecoder.decode(url.getFile(), "UTF-8");  
                    findAndAddClassesInPackageByFile(packageName, filePath,  
                            recursive, classes);  
                } else if ("jar".equals(protocol)) {  
                    System.err.println("jar error");  
                    JarFile jar;  
                    try {  
                        jar = ((JarURLConnection) url.openConnection())  
                                .getJarFile();  
                        Enumeration<JarEntry> entries = jar.entries();  
                        while (entries.hasMoreElements()) {  
                            JarEntry entry = entries.nextElement();  
                            String name = entry.getName();  
                            if (name.charAt(0) == '/') {  
                                name = name.substring(1);  
                            }  
                            if (name.startsWith(packageDirName)) {  
                                int idx = name.lastIndexOf('/');  
                                if (idx != -1) {  
                                    packageName = name.substring(0, idx)  
                                            .replace('/', '.');  
                                }  
                                if ((idx != -1) || recursive) {  
                                    if (name.endsWith(".class")  
                                            && !entry.isDirectory()) {  
                                        String className = name.substring(  
                                                packageName.length() + 1, name  
                                                        .length() - 6);  
                                        try {  
                                            classes.add(Class  
                                                    .forName(packageName + '.'  
                                                            + className));  
                                        } catch (ClassNotFoundException e) {  
                                            // log  
                                            e.printStackTrace();  
                                        }  
                                    }  
                                }  
                            }  
                        }  
                    } catch (IOException e) {  
                        e.printStackTrace();  
                    }  
                }  
            }  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
        Class<?>[] rclasses = new Class<?>[classes.size()];
		for(int i = 0; i < classes.size();i++){
			rclasses[i] = classes.get(i);
		}
        return rclasses;  
	}
	
	private static void findAndAddClassesInPackageByFile(String packageName,  
            String packagePath, final boolean recursive, List<Class<?>> classes) {  
        File dir = new File(packagePath);  
        if (!dir.exists() || !dir.isDirectory()) {  
            return;  
        }  
        File[] dirfiles = dir.listFiles(new FileFilter() {  
            @Override
			public boolean accept(File file) {  
                return (recursive && file.isDirectory())  
                        || (file.getName().endsWith(".class"));  
            }  
        });  
        for (File file : dirfiles) {  
            if (file.isDirectory()) {  
                findAndAddClassesInPackageByFile(packageName + "."  
                        + file.getName(), file.getAbsolutePath(), recursive,  
                        classes);  
            } else {  
                String className = file.getName().substring(0,  
                        file.getName().length() - 6); 
                try {  
                        classes.add(Thread.currentThread().getContextClassLoader().loadClass(packageName + '.' + className));    
                } catch (ClassNotFoundException e) {  
                    e.printStackTrace();  
                }  
            }  
        }  
    }
}
